Gang Jian Steel Industry Co., Ltd. (GJSI) was establised in 1976. The main business custom was China Steel Corp. (CSC). After the first stage of CSC construction, GJSI turned into the best partner with Lon Chen Fa Iron Works Co., Ltd. (LCF) For the following years, GJSI has completed many great project with the partner(LCF), such as construction for steel plant (China Steel Corp., C. S. Aluminium Corp., An feng steel, Chang Ming Steel, Tung Ho Steel Enterprice Corp., Asia Pacific Lon Kang Steel), China Shipbuilding Corp.(CSBC), CPC Corp., Taiwan Power company, and Taiwan Railway Administration (TRA).

GJSI was readjusted in 2001. GJSI enlarged and started to take business directly from the customers. Right now, GJSI's main business is from China Steel Machinery Corp. (CSMC), Gloria Material Technology Corp. (GMTC), TECO Electric and Machinery Co., Formosa Plastics Group, TRA, CSBC, Nabtesco(Japan), Steel Plantect(SPCO/Japan), SMS DEMAG(Germany).